环境治理工程对蠡湖水体中磷空间分布的影响
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2020-03-24 14:44:41
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中国环境科学2013,33(7):1271~1279ChiIlaEnvironmentalScience环境治理工程对蠡湖水体中磷空间分布的影响张博1’。,李永峰卜,姜霞p,王书航2,胡佳晨1,2(1.东北林业大学林学院,黑龙江哈尔滨150040;2.中国环境科学研究院,环境基准与风险评估国家重点实验室,北京100012)摘要:为评估水环境治理工程措施对蠡湖水体营养状态的影响,2012年4月对湖体与环湖河口调查分析,研究了蠡湖磷元素空间分布特征及其影响因素.结果表明:蠡湖水体总磷浓度介于O.03~o.3lm扎之间,平均为0.06m妒。,呈由西向东逐渐递增的趋势,且环湖河口磷含量明显高于湖体;沉积物中总磷空闻分布趋势类似于水体,湖体总磷含量在321,77~1062.08m到咯之问,平均为593,75m戤g,而环湖河口总磷含量在523.38~1396.39mg瓜g之间,平均为784.5lm班g;结合历年监测数据可以看出,一系列水环境治理工程使得蠡湖水质有了大幅度的改善,水体中总磷的年均值由治理前0,18mg几下降到O.06mg/L,但仍没有完全从根本上解决水体的富营养化问题.主要原因是沉积物中总磷对水体影响较大,相关性分析表明磷的扩散通量与沉积物总磷和可交换态磷成显著正相关.关键词:蠡湖:磷;沉积物;内源负荷:释放通量中图分类号:x524文献标识码:A文章编号:1000一6923(2013)07一127l—09InnuencesofenvjronmentalgoVernancepI.ojectonspatialdistributionofphosphorusinLjhuLake.ZHANGBo‘’-,LIY0ng.fen91.,JIANGxia2‘,WANGshu-han92,HuJia.chenl,2(1.Fores仃yIIlstitute,NorcheastFores仃yuniversi饥Harbin150040,China:2.S诅teKeyLaborato巧ofEnvimnmentalCriteriaaIld砌skAssessmem,ChineseResearchAcademyofEnviromentalscience,Beijing100012,china).c矗f砌Ewfm玎埘朗胁z&fP玎cP,2013,33(7):1271~1279Abstract:InordertoeValuatetheimpactoftllewaterenvironmemgovemanceprojectontllewaterquaIityiIlLihuLake,thispapersnJdiedon协eSpatialdis扛ibutionofphosphonIsarIditshlflu∞cing南lctorSby觚illvestigation证theLihuLakeinApril,2012.111eresultsshoWedthatmeTPcontentSinmewater砌ged胁m0.03toO.31m叽witlltlleme锄valucof0.06ml儿,andincreaSedf沁mthe、vesttotheeaSt.Att11es锄etime,TPmt11eestuarieswashigllermanthatinthelake.ThespatialdistributionofTPiIlt'lesedimentswaSsimilartothatmthewater.TheTPi11tIlesedimentSinthelake啪ged丘Dm321.77to1062.08mg瓜gwimmemeanvalueof593.75m眺g,meTPiIltheestuaries啪ged仔om523.38to1396.39m∥kgwiththeme锄VaIueof784.51mg瓜g.Thelong-tennmonitoringdataofwatershowedtIlatthewaterquali哆hadbeensubstaJltiallyimprovedbyaseriesofwater廿eatmentprojects,meannualaverageofTPin啪terfellfbm0.18mg/LdowntoO.06mg几aRergoVemallcep叫ect.HoweVer,duet0theintemalloadingofph0Sphorustheeu仃I叩hicationisstillthemeanpmblemswearefkingFurthe姗ore,tllecon.elationanalysisiIldicatedthatmedimJsionnuxofphosphomswaSpos“ivelycorrelatedwiththeTP她dmeexch
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